Here with Me. The Victory Series, #6

Sage Walters has a problem. Someone is trying to steal her data, probably to sell it to a competitor. Luckily, she used to work for a company that can deal with problems like that. Her old boss and colleagues at Victory are all too eager to help her trap the culprit. Well, all except one. She assumes Royce Shreiver, the guy who stole her heart and never gave it back-even though he tried hard enough-will find something more pressing to do.
It is almost Christmas, after all. Royce is on a personal job when he gets the call from his boss, but when he learns the person who needs his help is Sage, there's no question he'll be there. He owes her, after the way things ended two years ago. When her simple in-house espionage situation escalates, he realizes that what stopped him from being with her before is no longer an obstacle. But the way he handled it is.
Maybe it's not too late, but before he can dredge up the courage to try, they have to make sure she survives to Christmas Eve.